CONTINUOUS COIL PRETREATMENT PROCESS
First Claim
1. A continuous coil pretreatment process comprising:
- a) applying a cleaner to a surface of an aluminum sheet or a coil;
b) etching the surface of the aluminum sheet or the coil with an acidic solution;
c) rinsing the surface of the aluminum sheet or the coil with deionized water;
d) applying to the surface of the aluminum sheet or the coil a solution of an acidic organophosphorus compound;
e) rinsing the surface of the aluminum sheet or the coil with deionized water; and
,f) drying the surface of the aluminum sheet or the coil.
6 Assignments
0 Petitions
Accused Products
Abstract
Described herein is a continuous coil pretreatment process used to treat the surface of an aluminum alloy sheet or coil for subsequent deposition of an acidic organophosphorus compound. The process can include applying a cleaner to a surface of an aluminum sheet or a coil; etching the surface of the aluminum sheet or the coil with an acidic solution; rinsing the surface of the aluminum sheet or the coil with deionized water; applying to the surface of the aluminum sheet or the coil a solution of an acidic organophosphorus compound; rinsing the surface of the aluminum sheet or the coil with deionized water; and drying the surface of the aluminum sheet or the coil.
8 Citations
22 Claims
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1. A continuous coil pretreatment process comprising:
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a) applying a cleaner to a surface of an aluminum sheet or a coil; b) etching the surface of the aluminum sheet or the coil with an acidic solution; c) rinsing the surface of the aluminum sheet or the coil with deionized water; d) applying to the surface of the aluminum sheet or the coil a solution of an acidic organophosphorus compound; e) rinsing the surface of the aluminum sheet or the coil with deionized water; and
,f) drying the surface of the aluminum sheet or the coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A continuous coil pretreatment process comprising:
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a) applying a cleaner to a surface of an aluminum sheet or a coil by hot water spray impingement; b) etching the surface of the aluminum sheet or the coil with an acidic solution, optionally combined with surfactant additives or accelerators, at a temperature of from about 55°
C. to about 85°
C. for a period of about 5 to about 15 seconds;c) rinsing the surface of the aluminum sheet or the coil with deionized water at a temperature of about 37°
C. to about 70°
C.;d) applying to the surface of the aluminum sheet or the coil a solution of an acidic organophosphorus compound at a temperature of about 45°
C. to about 85°
C. for period of about 5 seconds to about 20 seconds;e) rinsing the surface of the aluminum sheet or the coil with deionized water either immediately after application of the acidic organophosphorus compound or about 1 to about 5 seconds later; and
,f) drying the surface of the aluminum sheet or the coil.
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Specification